projectdiscovery/nuclei-templates ? reverse-engineered prompt

I want to build a public repository for a community-driven collection of security checks. This will be used by a scanning tool to find vulnerabilities in applications, similar to the Nuclei project.

The core of the project should be a well-organized set of template files. Let's create a folder structure to categorize the checks by the type of technology they target, for example http, dns, cloud, and file.

Each template needs to store metadata about the vulnerability, like its severity level (e.g., critical, high, medium), relevant tags, and any associated CVE numbers. I also want a way to specifically track and flag vulnerabilities that are known to be actively exploited, maybe by referencing public lists like the CISA catalog.

Since this is a community project, please set it up with contribution guides and pull request templates to make it easy for others to submit new templates.